const { Clutter, Gio, GLib, GObject, St } = imports.gi;

const PanelMenu = imports.ui.panelMenu;
const PopupMenu = imports.ui.popupMenu;

const MOUSE_A11Y_SCHEMA       = 'org.gnome.desktop.a11y.mouse';
const KEY_DWELL_CLICK_ENABLED = 'dwell-click-enabled';
const KEY_DWELL_MODE          = 'dwell-mode';
const DWELL_MODE_WINDOW       = 'window';
const DWELL_CLICK_MODES = {
    primary:   {
                 name: _("Single Click"),
                 icon: 'pointer-primary-click-symbolic',
                 type: Clutter.PointerA11yDwellClickType.PRIMARY
               },
    double:    {
                 name: _("Double Click"),
                 icon: 'pointer-double-click-symbolic',
                 type: Clutter.PointerA11yDwellClickType.DOUBLE
               },
    drag:      {
                 name: _("Drag"),
                 icon: 'pointer-drag-symbolic',
                 type: Clutter.PointerA11yDwellClickType.DRAG
               },
    secondary: {
                 name: _("Secondary Click"),
                 icon: 'pointer-secondary-click-symbolic',
                 type: Clutter.PointerA11yDwellClickType.SECONDARY
               },
};

var DwellClickIndicator = GObject.registerClass(
class DwellClickIndicator extends PanelMenu.Button {
    _init() {
        super._init(0.5, _("Dwell Click"));

        this._hbox = new St.BoxLayout({ style_class: 'panel-status-menu-box' });
        this._icon = new St.Icon({ style_class: 'system-status-icon',
                                   icon_name: 'pointer-primary-click-symbolic' });
        this._hbox.add_child(this._icon);
        this._hbox.add_child(PopupMenu.arrowIcon(St.Side.BOTTOM));

        this.add_child(this._hbox);

        this._a11ySettings = new Gio.Settings({ schema_id: MOUSE_A11Y_SCHEMA });
        this._a11ySettings.connect('changed::' + KEY_DWELL_CLICK_ENABLED, this._syncMenuVisibility.bind(this));
        this._a11ySettings.connect('changed::' + KEY_DWELL_MODE, this._syncMenuVisibility.bind(this));

        this._deviceManager = Clutter.DeviceManager.get_default();
        this._deviceManager.connect('ptr-a11y-dwell-click-type-changed', this._updateClickType.bind(this));

        this._addDwellAction(DWELL_CLICK_MODES.primary);
        this._addDwellAction(DWELL_CLICK_MODES.double);
        this._addDwellAction(DWELL_CLICK_MODES.drag);
        this._addDwellAction(DWELL_CLICK_MODES.secondary);

        this._setClickType(DWELL_CLICK_MODES.primary);
        this._syncMenuVisibility();
    }

    _syncMenuVisibility() {
        this.visible =
          (this._a11ySettings.get_boolean(KEY_DWELL_CLICK_ENABLED) &&
           this._a11ySettings.get_string(KEY_DWELL_MODE) == DWELL_MODE_WINDOW);

        return GLib.SOURCE_REMOVE;
    }

    _addDwellAction(mode) {
        this.menu.addAction(mode.name, this._setClickType.bind(this, mode), mode.icon);
    }

    _updateClickType(manager, click_type) {
        for (let mode in DWELL_CLICK_MODES) {
            if (DWELL_CLICK_MODES[mode].type == click_type)
                this._icon.icon_name = DWELL_CLICK_MODES[mode].icon;
        }
    }

    _setClickType(mode) {
        this._deviceManager.set_pointer_a11y_dwell_click_type(mode.type);
        this._icon.icon_name = mode.icon;
    }
});